The professional category listed on the platform are all the categories that Instantgo currently support. We use a large number of categories which can encapsulate different jobs and let people tag their specialities within those categories to allow users to search and find people more granularly. For example, a software developer will be able to tag all the different programming languages she knows to better narrow her expertise and be found for it on the platform.
If you can't find a category that actually describe your job or your expertise, please submit a request so we can review the possibility of adding that specific category. We usually list a category within the platform when there are sufficient professionals registered on that category to ensure the quality of our service and if this category falls within our terms and conditions and any other legal considerations we might have.